Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1.4) with ESMTP id 2603537 for flyrotary@lancaironline.net; Thu, 25 Sep 2003 13:22:34 -0400 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-01.southeast.rr.com (8.12.5/8.12.2) with SMTP id h8PHF10R014956 for ; Thu, 25 Sep 2003 13:15:02 -0400 (EDT) Message-ID: <002001c38389$53a0a120$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: DIE the short Answer Date: Thu, 25 Sep 2003 13:20:32 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01C38367.CC42B5E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C38367.CC42B5E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ..... therefore upsetting the A/F ratio. Rather, view it as simple a = mechansim for ensuring that more of the air/fuel mixture already there = at the intake port gets into the chamber each time it opens.=20 OK, I guess I can see that. =20 Next silly question- If temp is so important, will it matter where the = injectors are? Imagine having the stock primaries in the block, along = with secondaries in the TB. I imagine that the fuel atomization lowers = the temp, so will the temp change along the pipe as new injectors are = encountered? Would it be better to have all 4 injectors in the throttle = body? =20 Rusty (EDDIE perturbance) There is no doubt that having fuel injected and turned to vapor in the = runners will indeed lower temps. My most recent intake tubes (4 = injectors in throttle body) gets so cool that moisture would condensed = on them on a 80F day. First thought I had a fuel leak {:>). I guess = we could do what Mazda did, they used coolant to stabilize temperature = of their intake manifold. =20 Have not really got into thinking about some of the second order = effects. They mostly would affect the speed of sound, slowing it down = mostly. That would in effect lower the EDDIE rpm requried. Considering the magnitude of the effect on EDDIE, variations in = Manifold Air Temp is about the third most significant factor - maybe the = fourth. =20 Ed ------=_NextPart_000_001D_01C38367.CC42B5E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
.....=20  therefore upsetting the A/F ratio.  Rather, view it as = simple a=20 mechansim for ensuring that more of the air/fuel mixture already = there at=20 the intake port gets into the chamber each time it opens. 
 
OK, I guess I can see that. =20
 
Next silly question- If temp is so = important, will it=20 matter where the injectors are?  Imagine having the stock = primaries in=20 the block, along with secondaries in the TB.  I imagine that = the=20 fuel atomization lowers the temp, so will the temp change along the = pipe as=20 new injectors are encountered?  Would it be better to have = all 4=20 injectors in the throttle body? =20
 
Rusty (EDDIE=20 perturbance)
 
There is no doubt that having fuel injected = and=20 turned to vapor in the runners will indeed lower temps.  My most = recent=20 intake tubes (4 injectors in throttle body) gets so cool that moisture = would=20 condensed on them on a 80F day.  First thought I had a fuel leak=20 {:>).   I guess we could do what Mazda did, they used = coolant to=20 stabilize temperature of their intake manifold. =20
 
Have not really got into thinking about = some of the=20 second order effects.  They mostly would affect the speed of = sound,=20 slowing it down mostly.  That would in effect lower the EDDIE rpm = requried.
 
Considering the magnitude of the effect on = EDDIE,=20 variations in Manifold Air Temp is about the third most significant = factor -=20 maybe the fourth. 
 
Ed=20
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